<template>
<view class="goods-item">
         <!-- 商品左侧的图片区域 -->
         <view class="goods-item-left">
           <!-- 勾选框 checked: 默认已勾选 -->
           <radio :checked="goods.goods_state" color="#c00000" v-if="showRadio" @click="radioClickHandler"></radio>
           <image :src="goods.goods_small_logo || defaultPic" class="goods-pic" ></image>
         </view>
         <!-- 商品右侧信息区域 -->
         <view class="goods-item-right">
           <!-- 商品标题 -->
           <view class="goods-name">{{goods.goods_name}}</view>
           <view class="goods-info-box">
              <!-- 商品价格 goods_price-->
             <view class="goods-price">￥{{goods.goods_price | tofixed}}</view>
             <!-- 商品数量 -->
             <uni-number-box :min="1" :value="goods.goods_count" v-if="showNum" @change="numberChangeHandler"></uni-number-box>
           </view>
         </view> <!-- goods-item-right ending -->
       </view> <!-- goods-item ending -->
</template>

<script>
  export default {
    props: {
          // 商品的信息对象
          goods: {
            type: Object,
            defaul: {},
          },
          // 3.1 是否显示图片左侧的radio
          showRadio: {
            type:Boolean,
            defaule:false,
          },
          // 4.1 是否展示价格右侧 NUmberBox组件
          showNum:{
            type:Boolean,
            default:false,
          }
        },
    data() {
      return {
        defaultPic:'https://img3.doubanio.com/f/movie/8dd0c794499fe925ae2ae89ee30cd225750457b4/pics/movie/celebrity-default-medium.png'
      };
    }, // data   ending
    filters: {
      // 把数字处理为带两位小数点的数字
      tofixed(num) {
        return Number(num).toFixed(2)
      }
    } , //  filters ending
    methods:{
      radioClickHandler() {
        // 通过 this,$emit() 触发外界通过 @ 绑定的radio-change 事件
        // 同事把商品的id 和 勾选状态 作为参数 传递给 radio-change 事件处理函数
        this.$emit('radio-change',{
          goods_id: this.goods.goods_id,
          goods_state: !this.goods.goods_state
        })
      },
      // numberBox 阿健的 change 事件处理函数
      numberChangeHandler(val) {
        // 通过 this,$emit() 触发外界通过 @ 绑定的num-change 事件
        this.$emit('num-change', {
          goods_id: this.goods.goods_id,
          goods_count: +val
        })
      }
    } // methods  ending
  } // 最外层 ending
</script>

<style lang="scss">
.goods-item {
  width: 750rpx;
  box-sizing: border-box;
  padding: 10px 5px;
  display: flex;
  border-bottom: 1px solid #f0f0f0;
  .goods-item-left {
   margin-right: 5px;
   display: flex;
   justify-content: space-between;
   align-items: center;
    .goods-pic {
      width: 100px;
      height: 100px;
      display: block; // 隐藏图片空白间隙
    }
  }
  .goods-item-right {
    display: flex;
    flex: 1;
    flex-direction: column;
    justify-content: space-between;
    .goods-name {font-size: 13px;}
    .goods-info-box {
      font-size: 16px; 
      color:#c00000;
      display: flex;
      align-items:center;
      justify-content: space-between;
      }
  }
}
</style>